(19)
(11) EP 0 355 734 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
08.05.1991 Bulletin 1991/19

(43) Date of publication A2:
28.02.1990 Bulletin 1990/09

(21) Application number: 89115259.7

(22) Date of filing: 18.08.1989
(51) International Patent Classification (IPC)5: D21H 23/06
// D21H13/00, D21H13/26, D21H21/14, D21H21/28
(84) Designated Contracting States:
DE FR GB

(30) Priority: 18.08.1988 US 233634

(71) Applicant: E.I. DU PONT DE NEMOURS AND COMPANY
Wilmington Delaware 19898 (US)

(72) Inventors:
  • Hendren, Gary Lee
    Richmond Virginia 23233 (US)
  • Hesler, Lee James
    Richmond Virginia 23235 (US)

(74) Representative: Abitz, Walter, Dr.-Ing. et al
Patentanwälte Abitz & Partner Postfach 86 01 09
81628 München
81628 München (DE)


(56) References cited: : 
   
       


    (54) Cross-directional distribution of additives in synthetic papers


    (57) A process for making a wet-laid, elongate, nonwoven flexible sheet having an additive distributed in a predetermined cross-directional pattern includes providing two synthetic fibrous stocks containing the additive in a concentration higher in one stock than in the other stock. The stocks are supplied to a paper machine having a headbox for depositing the stocks on a wire to form a wet sheet with the stocks being introduced into the headbox from a plurality of cross-directional positions equally spaced-apart along the headbox with a generally equal amount of solids being introduced at each position and with the stock with the higher concentration being introduced in higher quantity than the other stock at least at one cross-directional position so that the additive is distributed in the predetermined cross-directional pattern.







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